I want to love this, but this is terrible. It introduces yet another markdown useless to edit for GitHub, Jekyll, Scrivener, AirMail, or the like.<p>Use pandoc markdown (now aka common markdown) for broadest compatibility and reasonably professional publishing, or github markdown for a developer audience, or let the user choose among engines.<p>Don't introduce another rando format. Phabricator did that and it's terrible too.<p>(Btw, www.texts.io supports both visual rich text style controls and markdown typing at the same time, rendered wysiwyg, and is cross platform. Also supports multiple dialects, with pandoc as the default: <a href="http://www.texts.io/support/0009/" rel="nofollow">http://www.texts.io/support/0009/</a>)